Which physiological response is associated with water temperatures above 90 degrees Fahrenheit?

The physiological response associated with water temperatures above 90 degrees Fahrenheit is an increase in metabolic and heart rates. When the body is exposed to high water temperatures, it attempts to maintain its core temperature through physiological adaptations.

As the temperature rises, the body activates mechanisms to cope with heat stress. This includes an elevation in heart rate to increase blood circulation and potentially enhance heat dissipation through the skin and sweating, if applicable. Additionally, metabolism may ramp up to support the increased energy demands and help regulate body temperature.

In contrast, although high temperatures can lead to challenges such as heat stress, the body's immediate initial response is to become more active in terms of metabolic processes to manage the heat, rather than reducing circulation or decreasing metabolic rates. Thus, the response of increased metabolic and heart rates accurately reflects how the body responds to elevated water temperatures.